Computing and registering mechanism



June 29, 1943;

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' Application- January-11, 1939, Serial No. 250,312

7 Claims.-

This invention relates to computing and indicating mechanism, and more particularly to mechanism which may be operated, say, to set up the rate or price per unit of a commodity as a multiplicand, to run in the number of units or quantity as the multiplier, and to compute and exhibit the product of the two as the selling price.

The invention is disclosed herein with particular reference to its utilization in connection with dispensing apparatus such as the gasoline pumps used at gasoline filling stations. Such disclosure is, however, to be regarded as illustrative, since the invention will, of course, be recognized as capable of other uses.

It is an important object of the invention to provide a -mechanism of the character stated in which all of theoperating parts are of small mass and inertia, and therefore capable of being started and stopped quickly'and with'a minimum ex-- penditure of power.

In a register for use with gasoline dispensing pumps it is desirable that the price per gallon,

' the number of gallons, and the resulting product or selling price of the quantity of gasoline delivered be all clearly indicated at mposite sides of the pump so that thepurchaser seated in his vehicle may read them, regardless of the side of the pump at which he may happen to draw up. These requirements are met in accordance with the present invention by providing like rate indicators, like quantity registers, and like price registers at opposite sides of the pump, and provision is made for operating the corresponding indicators or registers in common and in unison with one another.

The quantity and sale price registers are really sub-total registers with reference to the quantity of gasoline delivered and the money received through a series of sales, since they require to be re-set to zero after each sale. It is also desirable, however, that total'quantity and money registers be provided so that the proprietor of the station maybe afforded a check upon the I quantity of gasoline delivered and upon the total price received for the gasoline over a period of .45

time, which total registers should be incapable of reverse operation and should be inaccessible to the operatives of the station. In accordance with the present invention, total registers of the kind referred to are provided, and mechanism is also rov.ded for simultaneously setting the two sales quantity registers and the two sales price registers back to zero at a single operation, without aifecting the registers.

The present invention is, with respect to the multiplying mechanism, an improvement upon the invention disclosed and claimed in the copending application or Peter J. McLaren, Serial No. 160,052, filed August 20, 1937, for Variable speed mechanism, now Patent No. 2,177,611, and

with respect to the register mechanism and the operating means therefor an improvement upon the invention disclosed and claimed in the pending application of Peter J. McLaren, Serial No. 206,570, filed May 7, 1938, for Counters, now Patent No. 2,177,437.

In SerialNo. 160,052 disclosure is made of a series of differentials adapted to be coupled selectively and individually, or in any desired combination, with a common input or driving member, and of means for controlling and setting up various combinations of the difierentials so as to secure any integral driving ratio in regular and uninterrupted sequence between the common input member and a common output member over a wide range. Broadly, this is accomplished by so arranging the difierentials that each will have a definite individual driving value, and that the relation between the driving values of the several differentials will represent successive terms of a geometrical series constituting. powers of the number 2; If the first term of such a series be taken as 1 and the highest term as 2"- then the terms of this series may be taken individually and in various combinations for securing any integral number from- 1 through 211-1 In accordance with one illustrative disclosure of Serial No. 160,052, the difierentials are arranged in two banks, and each'difl'erential of a given bank has an input value four times as great as the neighboring diflerential of that bank of next lower value. The two banks, however, feed into a common output, and one bank has twice the output value of the other. Thus, one bank puts in values such as 1, 4, 16, 64, etc., while the other puts in values such as 2, 8, 32, 128, etc., the two banks combining to produce input values for the individual difierentials corresponding to the complete geometric series 1, 2,14, 8, 16, 32, 64, 128, etc. This arrangement and this mode of operation are desirably adhered to in the practice of the 

